ASCO, ITT, KRAS-WT primary OS results: CALGB failed to meet its primary endpoint of OS Cetuximab is not superior to Avastin in 1L KRAS-WT. CALGB/SWOG Phase III trial of FOLFIRI or mFOLFOX6 with bevacizumab or cetuximab for patients with expanded RAS analyses in. CALGB/SWOG Phase III trial of irinotecan/5-FU/leucovorin (FOLFIRI) or oxaliplatin/5-FU/leucovorin (mFOLFOX6) with bevacizumab (BV) or cetuximab.

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Researchers are in the process of examining the molecular biology that presumably underlies these findings.

To determine if the addition of cetuximab vs bevacizumab to the combination of leucovorin, fluorouracil, and oxaliplatin mFOLFOX6 regimen or the combination of leucovorin, fluorouracil, and irinotecan FOLFIRI regimen is superior as first-line therapy in advanced xalgb metastatic KRAS wild-type wt colorectal cancer. Toxicity and response criteria of the Eastern Cooperative Oncology Group.

See treatment administration and dose modification summary for details eTable 2 in Supplement 2. Vose, MD, MBA, FASCOremarked, “This is the largest study to date of tumor location in colorectal cancer, and it strongly suggets that this capgb factor could answer some long-standing questions about why calgv patients do better than others.

Analyses are based on clinical data and patient follow-up as of December 15, Fluorouracil became the only cytotoxic drug indicated for colorectal cancer in the s 1 when the adoption of continuous infusion of this agent was found to have improved the median overall survival from 12 to 15 months.

The Southwest Oncology Group partner for the present study oversaw specimen biobanking and the distribution of samples to laboratory investigators. Data for patient covariates were captured in the NCI-standardized format and entered at the time of patient registration usually by a clinical research associate at the treating institution.

Secondary objectives included progression-free survival and overall response rate, site-reported confirmed or unconfirmed complete or partial response.

Secondary objectives included progression-free survival and overall response rate, site-reported confirmed or unconfirmed complete or partial response. Second, this study only mandated first-line treatment with patients who at any time went more than 28 days without treatment being removed from study. Administrative, technical, or material support: Sign in to save your search Sign in to your personal account.


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Cwlgb last date of follow-up was December 15, Median overall survival was As of December 15,median follow-up for surviving patients was Patients with KRAS mutant tumors were excluded from analysis but were given the option to continue taking the study treatment. Overall survival was These findings persisted following exclusion of patients with any RAS mutations. This cooperative research group performed critical aspects of the present study: A fixed-block size of 9 was used prior to the study amendment that stopped enrollment into the double-biologic group.

PubMed Google Scholar Crossref. Combining biologic monoclonal antibodies with chemotherapeutic cytotoxic drugs provides clinical benefit to patients with advanced or metastatic colorectal cancer, but the optimal choice of the initial biologic therapy in previously untreated patients is unknown.

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Conflict of Interest Disclosures: Data quality was reviewed and audited by the Alliance Statistics and Data Center and by the study chairperson following Alliance policies. Response rates were The results for overall survival HR, 0. This is speculative, however, because the collection of subsequent treatment details across hundreds of sites in North America is extremely difficult and the details of such data would be open to questioning no matter the resources put into such an falgb.

Cetuximab monotherapy and cetuximab plus irinotecan in irinotecan-refractory metastatic colorectal cancer. Toxic effects that were lower than grade 3 were distinct with cxlgb rash predominating for cetuximab and hypertension predominating for bevacizumab. Eighty-two percent of patients of experienced disease progression.

Drs Venook and Niedzwiecki had full access to all of the data in the study and take responsibility for the integrity of the data and the dalgb of the data analysis. Main Outcomes and Measures: Sign in to download free article PDFs Sign in to access your subscriptions Sign in to your personal account.

The primary statistical analyses were 2-sided tests of superiority comparing cetuximab vs bevacizumab with regard to the primary and main secondary outcomes among patients whose tumors were determined to be KRAS wt exon 2, codons 12,13 by Southwest Oncology Group review using intention-to-treat analyses.


Dr Mulkerin reports receiving institutional research grant support from the NCI cooperative group funding. Critical revision of the manuscript for calvb intellectual content: As of December 15,median follow-up for surviving patients was The majority of patients also had access to both cetuximab and bevacizumab at progression because each biologic therapy was commercially available.

The chemotherapy by biologic interaction HR for overall survival was 1. James Cancer Hospital, Columbus. Patient and tumor characteristics are presented in Table 1. No significant differences were observed for either overall survival or progression-free survival in the primary analysis cohort.

Sign in to customize your interests Sign in to your calgh account. However, overall survival favored cetuximab by 3.

No adjustments were made for multiple comparisons in the analysis of secondary end points. Thus, these analyses should be considered exploratory. Results xalgb reported for 1 the primary 2-group comparison between cetuximab and bevacizumab; 2 the comparison of cetuximab vs bevacizumab in an expanded RAS subset described above; and 3 the chemotherapy subgroups.

Unplanned subgroup analyses were conducted for the expanded RASsex, race, and chemotherapy subsets. Among patients with KRAS wt untreated advanced or metastatic colorectal cancer, there was no significant difference in overall survival between the addition of cetuximab 84005 bevacizumab to chemotherapy as initial biologic treatment. It is also an important reminder, in this exciting era of precision medicine, that genomics is not the only source of insight into how cancers should be studied and treated.

A randomized crossover trial showed that these combination regimens were not statistically different, with patients receiving these agents in any sequence surviving a median 18 to 20 months. The consensus molecular subtypes of colorectal cancer.